I'm afraid not. My grandfather was Louis Hermann Wilhelm Otto Mueller, born in Braunsweig in 1890, died in Bremen in 1940. I have since found some information on his regiment from the US archives: http://www.vlib.us/wwi/resources/germanarmywwi.html I've narrowed down his division to one of 3 (234th, 235th or 236th) and have pieced together his 1918 movements on the western front, but have not tracked down anything for his time on the eastern front in 1915 - his photos only say "Russland 1915". I did find the book in Germany, and have just spent a small fortune to purchase and ship it over. My Father will translate the relevent sections for me. The Prussian: Do you know the name of the volunteer whose picture you sent? The picture attached is of his regiment in early 1918 - my Grandfather is on the far right.